Weft-detecting mechanism for looms.



B. F. McGUINESS.

WEFT DETECTING MECHANISM FOR LOOMS.

Patented Apr. 24, 1917.

B. F. McGUlNESS.

WEFT DETECTING MECHANISM F0 OMS.

APPLICATION FILED MAR. 24. 1

1 ,ZZSJQD Pate Apr. 24,

EET$SHEE B. F. McGUlNESS.

WEFT DETECTING MECHANISM FOR LOOMS.

APPLICATION FILED MAR. 24.1916- Patented Apr. 24, 1917.

3 SHEETSSHEET 3 TITT SATS PATEN @FFTQ BENJAMIN F. MGGUINESS, OF SAUNDERSVILLE, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, 0F WORCESTER, MASSACHUSETTS, A COR- PORATION OF MASSACHUSETTS.

WEFT-DETECTING MECHANISM FOR LOOMS.

neesaroe.

Application filed March 24, 1916.

To all whom it may concern:

Be it known that I, BENJAMIN F. MoGUIN- ass, a citizen of the United States, residing at Saundersville, town of Grafton, in the county of Worcester and State of hlassachusetts, have invented a new and useful Weft Detecting Mechanism for Looms, of which the following is a specification.

This invention relates to certain improvements in weft detecting mechanism for looms and more particularly to improvements in that type of detecting mechanism in which a center fork or detecting member is used.

Such members perform their detecting function while the freshly inserted weft lies loose in the shed, and the fork or member carries the weft downward, to form a more or less defined loop between the warp threads at the point of engagement. In weft detectors of this type, the detector has commonly been allowed to rest upon the weft until the forward movement of the lay draws the detector away from the weft which at the same time assumes a position adjacent the reed. The detector then passes entirely below the plane of the cloth and of the warp and remains in this position during the beat of the lay. method of operation is quite satisfactory, but it has been found that thin or lightweight fabrics when woven with this type of detector are often rendered defective by the beating in of the loops formed by the above described tension of the detector uponthe weft. If the loop does not actually appear in the cloth the weft will be loose at this point, and the cloth will have an uneven appearance.

It is the principal object of my invention to provide a simple mechanism for temporarily relieving the tension of the weft detector upon the weft after the detecting movement has been made, thus permitting the straightening of the above mentioned loop of weft before the beating up of the lay. For the greatest effectiveness this relief of tension should occur before the complete boxing of the shuttle. In the mechanism herein described the parts are so proportioned and arranged that this result is attained.

Further features of my invention relate to certain arrangements and combinations of parts which will be hereinafter described,-

Specification of Letters Patent.

For firm and heavy fabrics this Patented Apr. 2a, 1917.

Serial No. 86,507.

and more particularly pointed out in the appended claim.

Apreferred form of my invention and a modification thereof are shown in the drawmgs in which Figure 1 is a sectional elevation of certain parts of aloom with my improved detecting mechanism mounted thereon;

Fig. 2 is a side elevation of a portion of the mechanism shown in Fig. 1, drawn on an enlarged scale;

Fig. 3 is a front elevation, partly in section, taken along the line 3-3 in Fig. 2;

Figs. 4, 5 and 6 are diagrammatic side elevations of the detecting mechanism, showing the parts in different successive position s;

Fig. 7 is a view similar to Fig. 2 but showing a modified form of my invention, and

Fig. 8 is a top plan view of certain of the parts shown in Fig. 7

Referring to Fig. 1, I have indicated a loom side 10 to which is secured a breast beam 11 and a cross-girt 12, all of the usual form. A lay 13 is supported by swords 14: upon a rock shaft 15 pivoted in the loom side 10, and a transmitting shaft 16 is also pivotally supported in hearings in the loom side. The shaft 16 may be provided with suitable connections (not shown) by which the loom may be stopped or a fresh weft carrier may be inserted in the shuttle.

A center filling-fork or weft detector 20 is pivoted at 21 in bearings 22-22 (Fig. 3) formed on a stand 23, secured to the front face of the lay 13. A dagger 24 is pivoted on a stud 25 fixed to the lower portion of the stand 23 and is adjustably connected by a link 26 to the weft detector 20. A spring 27 encircles the end of the stud 25, one end of the spring being secured in a notch in the end of the stud and the other end engaging a pin 28 projecting from the side of the dagger 24:. At its rear end the dagger is provided with an extension or shoe 30 which is engaged by the upper end of an actuating rod 31.

The rod 31' is pivoted at its lower end on a stud 32 adjustably secured in a slotted stand 33 carried by the cross-girt 12. The upper end of the rod 31 is guided in a bearing 34 formed on the lower end of the stand 23. The relative position of the rock shaft 15 to the stud 32 is such that the rod 31 will move upward through the bearing 34 as the lay moves backward, thus depressing the dagger and raising the weft detector to the position shown in Figs. land 2. As the lay moves forward the rod 31 will move downward relatively to its bearing 34 and the detecting mechanism will be released for yielding detectlng movement under the influence of the spring 27.

A notched collar 35 is rigidly secured to the transmitting shaft 16, the notch 36 therein being positioned for engagement by the dagger 24 whenever the weft detector indicates absence o f weft in the shed. When the detector engages a freshly inserted weft in the shed the weight of the detector and the tension of the spring 27 will cause the weft to loop downward as indicated at l/V in Fig. 4, but the weft will nevertheless cause the point of the dagger to clear the notch 36.

The collar 35 is provided with a camshaped projection 37 adjacent the notch 36 and positioned to engage the end of the dagger and to force the same downward whenever it fails to-engage the notch. The position of the parts is then as shown in Fig. 5, the detector 20 being given a partial upward movement, thus relieving the tension of the detector upon the weft W. The weft can thus more easily pass to its final position adjacent the reed 40.

Furthermore, the pa rts are so timed that the detector will be lifted slightly before the complete boxing of the shuttle, so that the final movement of the shuttle will straighten the loop formed in the weft before it is beaten up by the lay.

The centers of the rock shaft 15 and the transmitting shaft 16 are so disposed that the dagger 2 1 will be made to clear the collar 35 and its projection 37 by the continued forward movement of the lay, thus permitting the detector to move to its extreme lower position as indicated in Fig. 6. In this position the detector is entirely below the plane of the cloth C, and the weft W may be beaten into the cloth by the reed 40 without interference with said detector.

In practical operation this temporary relieving of the pressure upon the freshly inserted weft is found to prevent the defects previously encountered in thin and lightweight fabrics when a center weft detector is used.

In Figs. 7 and 8 I have shown my invention applied to a center weft detector of slightly different type. In these figures the lay is indicated at 50, the breast beam at 51, the transmitting shaft at 52 and the filling-fork or weft detector at 53. The de tector is pivoted at 54 to a stand 55 secured to the lay 50 and is connected by a link 56 to an engaging member 57. When in its rearward position the member 57 engages a cam plate 58 adj ustably secured to a stand 59 bolted to the breast beam 51. By such engagement the weft detector is raised to its inoperative position.

As the lay moves forward the member 57 moves down along the cam-plate 58, thus permitting the detector to move to the position shown in full lines in Fig.7, in which position it will engage a weft W, freshly inserted in the shed. If no weft is positioned in the shed, the detector will move still farther downward and the member 57 will engage a notch 60 formed in the end of an actuating arm 61 pivoted at 62 to the stand 59 and provided with a stud 63 which in turn engages an arm 64 through which the transmission shaft 52 may be moved.

In its upper portion the arm 61 is pro-' vided with a cam-shaped projection 65 similar in function to the projection 37 of the notched collar 35 previously described. 1f the member 57 clears the notch 60 it will engage the cam 65 and the weft detector 53 will be thereby raised to the position shown in dotted lines in Fig. 7. Continued forward movement of the lay will carry the member 57 beyond the cam 65, thus permitting the fork to drop to its extreme lower position, entirely beneath the plane of the.

cloth.

Having thus described a preferred form of my invention and a modification thereof, it will be evident that other changes and modifications can be made therein without departing from the spirit and scope of my invention as set forth in the claim, and I do not wish to be otherwise limited to the details herewith disclosed, but what I claim In a loom, in combination, a lay, a detecting member pivotally mounted on said lay, a-transmitting shaft, a notched collar fixed on said shaft, and a dagger movable with the lay and positioned by said detecting member, said collar having a cam surface thereon positioned to engage said dagger whenever it clears the notch in the collar and to thereby temporarily remove the detectin member from the newly inserted weft, said dagger being thereafter released by the relative angular movements of said shaft and lay, and permitting said memberto pass below the warp during the continued forward movement of the lay.

In testimony whereof I have hereunto set my hand.

BENJAMIN F. MGGUINESS.

Copies of this patent may be obtained for five cents each, by addressing'the Commissioner of Patents. Washington, D. G. 

